Synaflex Solutions | Legacy C/C++ & C# Modernisation, Automated QA & IV&V for UK SMEs

WHO WE ARE

Committed to adding real value to your business

Our engineers have worked in the software industry for over 20 years, covering sectors such as Defence & Aerospace, Mobile Phone, Transport, Finance, and Gaming (Xbox One, Windows 10).

We build flexible & reliable software solutions we have confidence in by using Test Driven Development (TDD), SOLID principles, and CI/CD automation. This combination ensures future updates don’t degrade your systems, catches errors early, and allows your software to pivot toward new technologies quickly and cost-effectively.

ENGAGEMENT MODELS

Two clear ways to work with us

Choose the pace that fits your urgency, budget and internal bandwidth. Both models deliver the same high-quality, test-driven outcomes.

Focused

DEDICATED TEAM • FASTEST DELIVERY

We dedicate focused effort to your package. You get maximum velocity and a firm calendar commitment.

BEST FOR

Time-critical modernisation, large refactors, or building new automated test suites from scratch.

Fractional (elapsed-time)

FLEXIBLE • LOWER RATE

Fixed weekly or monthly hours (e.g. 8 hrs/wk) at a reduced rate. Background priority, non-exclusive. Ideal when quality matters but the work can run alongside other priorities.

BEST FOR

Ongoing maintenance, gradual legacy modernisation, or long-running independent validation & verification.

Every engagement is a discrete, fixed-scope package. Clear deliverables, clear cost, clear timeline — no open-ended retainers.

WHAT WE DO

Three focused services for UK SMEs

Specialists in modernising legacy C, C++ and C# codebases, adding automated QA for code drops, and providing independent verification through automated BDD test suites.

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Legacy Software Modernisation

We take your existing C, C++ or C# line-of-business codebases and bring them up to a maintainable, testable standard so they can be extended safely for years to come.

Focused or Fractional engagements.

🧪

Automated Quality Assurance for Code Drops

When contractors or teams deliver code, we build automated regression test suites and CI pipelines so you can validate quality quickly, objectively and independently.

Focused or Fractional engagements.

✅

Independent Verification & Validation (IV&V)

We create automated BDD (Behaviour-Driven Development) test suites directly from the acceptance criteria you provide. Ideal when you outsource development and need an independent check that delivered work actually meets your requirements.

Focused or Fractional engagements.

HOW WE WORK

Our 6-step modernisation approach

A repeatable, low-risk process for bringing legacy C, C++ and C# codebases under control.

Build

Get the codebase compiling cleanly on current compilers and frameworks. Establish characterisation tests.

Test

Raise unit-test coverage to a practical, useful level so changes can be made safely.

Analyse & Clean

Eliminate errors and warnings. Use static analysis to reduce high-complexity risk areas.

Refactor

Remove code smells. Apply SOLID principles for maintainable, loosely-coupled design.

Automate

Add automated build, test and deploy scripts. Set up CI/CD pipelines.

Document

Author practical documentation focused on key behaviours and how the system actually works.

This process applies to Legacy Modernisation work. QA for code drops and IV&V follow a similar disciplined, automated approach.

REAL WORLD RESULTS

Selected projects

Defence & Aerospace

Man-Portable RADAR Interface

High-reliability user interface for a man-portable RADAR system, enabling real-time display of plot data and tracks, precise camera pointing to selected returns or tracks, and full configuration of RADAR operating modes, camera integration security zones, and geospatial mapping overlays.

Gaming

Game Telemetry, Testing & Performance Platform

Built a multi-threaded C++ RPC telemetry server embedded within the game and leveraged it to create a complete automated testing ecosystem for a cross-platform AAA title on Xbox One and Windows.

Transport

Complex Ticketing & Business System

Modernized an end-to-end ticketing, passenger management and revenue platform for Cubic Transportation and built a comprehensive unit test suite that stabilized the legacy C++ codebase, accelerated development velocity and instilled release confidence—prompting the client to enforce unit testing standards across all their other projects.

View detailed results →

CLIENT VOICES

What our clients say

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"Our Synaflex consultant was polite, professional and always got the job done to a high level of quality. I wouldn’t hesitate to use Synaflex again."

— Dave Knight, Founder of Igence Software Limited

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"Truly understands Agile, Test Driven Development and SOLID code design principles. Someone who can apply these skills to both C# and C++ is very rare indeed."

— Jonathan Holford, Lead Developer at Microsoft Game Studios

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"Fantastic software engineers who are great to work with, highly technically capable and full of innovative ideas."

— Daniel Callaway, Founder of CodeCept Limited